CUPLEX for Pc & Linux - Free Download (2026)

CUPLEX Screenshots

How to Install CUPLEX on Windows Pc

Click on the CUPLEX download button below.
Choose "Install" to install the game on the windows steam client.
Follow the on-screen prompts
Let it download the Full Version.
Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

Guide: Installing CUPLEX on Linux with Steam Proton

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

System Requirements

Windows Pc Requirements

Minimum:

Requires a 64-bit processor and operating system
OS: Windows 10+
Processor: Intel Core i3
Memory: 8 GB RAM
Graphics: Intel Iris Plus Graphics
Storage: 1 GB available space

Recommended:

Requires a 64-bit processor and operating system

Linux Requirements

Minimum:

Recommended:

Mac Requirements

Minimum:

Recommended:

What is CUPLEX? Features and Description

----At the end of pursuit, your body becomes the history. "CUPLEX" is a time-shift action puzzle game where you cooperate with "your past self" to reach the goal. Utilize various gimmicks to conquer stages and unveil the truth behind CUPLEX.

[Overview]

"CUPLEX" is a time-shift action puzzle game where you cooperate with "your past self" to reach the goal. With each turn, your "past self" multiplies.
You will utilize them effectively to solve complex and orderly puzzles.

[Story]

Welcome to the new virtual space, "CUPLEX". This is a virtual space, where unlike traditional ones, all senses... including sight, hearing, smell, taste, and touch, are interconnected. The protagonist, "Cube" hacked into the "Library" within CUPLEX in search of specific information. As he progresses through the Library, the truth behind CUPLEX gradually unfolds. Will he be able to accomplish his mission in the end...?